Exercise cycle



FIG. 1 is a perspective view of an exercise cycle showing our design;

FIG. 2 is a right side elevational view;

FIG. 3 is a left side elevational view;

FIG. 4 is a front elevational view;

FIG. 5 is a rear elevational view;

FIG. 6 is a top plan view;

FIG. 7 is a bottom plan view.

The ornamental design for an exercise cycle, as shown and described.